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Erschienen in:
2008 | OriginalPaper | Buchkapitel
Thermodynamic and Kinetic Approach to Ductility-Dip Cracking Resistance Improvement of Ni-base Alloy ERNiCrFe-7: Effect of Ti and Nb Additions
verfasst von : A.J. Ramirez, C.M. Garzón
Erschienen in: Hot Cracking Phenomena in Welds II
Verlag: Springer Berlin Heidelberg
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Previous research has suggested that significant improvement in ductility-dip cracking resistance of ERNiCrFe-7 weld metal can be obtained if sec-ond phase precipitation during welding is optimized with some carbide and nitride forming element additions. Therefore, a theoretical and experimen-tal work has been conducted to address the effect of Nb and Ti additions to the precipitation of second-phase particles during welding of a ERNiCrFe-7-like alloy. The critical precipitation temperatures, phase fractions and atomic partitioning in the microstructure were among the factors analyzed in the light of DDC resistance improvement.